OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   ; v, L$ f" I6 b
5. * brief  EDMA3 Test Application
   1 E6 J3 t/ @. V0 l/ R% M0 I
6. *
   ; O3 q/ Y9 d' I) m+ z* R
7. *   This file contains EDMA3 Test code.
   1 e# P2 \% d- }4 s( \& b7 M) ]
8. *
   0 Z! k) q: |6 b0 ^8 C
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    % D+ X3 h/ g9 @, j* M4 c
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    / Y" u5 i$ k  R
14. *
    
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    8 O. g# I, }2 Z: K: |3 ~: Q$ U
17. * published by the Free Software Foundation version 2.
    / O2 }8 p% D1 w2 c2 ~! _* h3 I  H
18. *
    9 E& m0 M. E4 e2 P4 A4 ?# n
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    1 v$ F4 z3 F( y
25. #include <linux/module.h>
    / R# X. n: E/ f2 Q
26. #include <linux/init.h>
    ) ~- [! E" q" C7 o; F; a
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    & i# t- H! S/ B# \0 a# u
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    % a* Q# B- A8 _3 f3 i- ?1 b6 U
36. #include <mach/memory.h>
    . o: f6 F4 E' I0 ^
37. #include <mach/hardware.h>
    ! F/ \7 V) }( I* x
38. #include <mach/irqs.h>
    ; s" a7 i$ F+ r% x
39. #include <asm/hardware/edma.h>
    
40. 
    , ?: {4 I! U" }) P, ?
41. #undef EDMA3_DEBUG
    ) J; R. ^1 i4 y8 V% Q
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    : M8 v6 C6 k- X) T8 E
50. #define DMA_FN_IN
    & V  _/ ]) H# M4 y0 [  C' r
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    : i  ^  {  P; C4 t  z0 P
56. #define TCINTEN_SHIFT               20
    " ~. V; |3 w$ G- Z- k' |* n
57. #define ITCINTEN_SHIFT              21
    % K# M( R* O2 M8 h$ r, E
58. #define TCCHEN_SHIFT                22
    + E0 V/ K" R9 U8 u$ `1 ~) l) ?, R4 Y
59. #define ITCCHEN_SHIFT               23
    - a8 V. o7 q5 O" r
60. 
    
61. static volatile int irqraised1 = 0;
    7 a) q' X( a4 D0 h
62. static volatile int irqraised2 = 0;
    & v" y5 Z. G; J7 c
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    / Q! Z' a: `. r8 h1 J, \8 d& @7 B
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
      [) p4 X4 s+ d4 K5 E- J/ k
71. dma_addr_t dmaphysdest2 = 0;
    ( y" V  M6 i0 T1 q3 Y
72. 
    
73. char *dmabufsrc1 = NULL;
    ! `& e! J9 h5 E# m$ K% u
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    ' ?) U8 H5 y! {
79. static int bcnt = 8;
    6 I& t% N: \  O) c( r3 r
80. static int ccnt = 8;
    
81. 
    6 e% w% ?5 F9 [$ S! Y+ n# ^
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    1 Z0 K$ F0 v" f4 k
84. module_param(ccnt, int, S_IRUGO);

复制代码

6 o/ Q8 ~" z& P( |: o& I- d- y
      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
3 K1 a1 V, }4 s3 ?& [; \4 E6 harm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
2 l9 o' F2 W' Z- m6 r' ]     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
, m2 J  X+ S, [+ j9 r9 i
0 ^7 Y2 U" s& P6 i, t% U0 m! v
! c% [8 L3 O, x& p2 l% G& X- q5 _